A solid metal weighing 150 g melts at its melting point of 800 o C by providing heat at the rate of 100 W

A solid metal weighing 150 g melts at its melting point of 800 o C by providing heat at the rate of 100 W. The time taken for it to completely melt at the same temperature is 4 min. What is the specific latent heat of fusion of the metal?

Answer

  1. P × t = mL => 100 × 4 × 60 = 150 × L (both side correct substitutions.)
  2. L = 160 J g-1 (answer is accepted in any unit.)